[worklets] Introduce ThreadedWorkletMessagingProxy and AnimationWorkletMessagaingProxy.

third_party/WebKit/Source/modules/webaudio/AudioWorklet.cpp

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "modules/webaudio/AudioWorklet.h"
 
 #include "bindings/core/v8/V8Binding.h"
 #include "core/frame/LocalFrame.h"
-#include "core/workers/ThreadedWorkletGlobalScopeProxy.h"

[hongchan, 2016/09/09 17:45:30]

I am not sure what this change means. Can you elaborate? So
AudioWorkletGlobalScope does not need to a proxy? Why?

[ikilpatrick, 2016/09/12 17:29:07]

I've reverted these changes. Basically it needs a proxy; but I was going to
remove ThreadedWorkletGlobalScopeProxy.h in this patch.

I've now added a TODO at the top of ThreadedWorkletGlobalScopeProxy to remove
that file :).

 
 namespace blink {
 
 // static
 AudioWorklet* AudioWorklet::create(LocalFrame* frame)
 {
     AudioWorklet* worklet = new AudioWorklet(frame);
     worklet->suspendIfNeeded();
     return worklet;
 }
 
 AudioWorklet::AudioWorklet(LocalFrame* frame)
     : Worklet(frame)
-    , m_workletGlobalScopeProxy(new ThreadedWorkletGlobalScopeProxy())
 {
 }
 
 AudioWorklet::~AudioWorklet()
 {
 }
 
 WorkletGlobalScopeProxy* AudioWorklet::workletGlobalScopeProxy() const
 {
-    return m_workletGlobalScopeProxy.get();
+    return nullptr;
 }
 
 DEFINE_TRACE(AudioWorklet)
 {
     Worklet::trace(visitor);
 }
 
 } // namespace blink